47778: Quasi Repdigit 477..778

First few terms (base 10): \[[47^*8_9]_n=\{44,395,3554,31985,287864,\ldots\}\]

First few terms (base 9): \[\{\text{48},\text{478},\text{4778},\text{47778},\text{477778},\ldots\}\]

General Formula:\[[47^*8_9]_n={351\cdot9^{n}+1\over8}\]

Equivalent Patterns: \[[15^*6_9]_n=3\cdot[47^*8_9]_{n-1}\] \[[32^*3_9]_n=6\cdot[47^*8_9]_{n-1}\] \[[64^*6_9]_n=12\cdot[47^*8_9]_{n-1}\] \[[81^*3_9]_n=15\cdot[47^*8_9]_{n-1}\]

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